This is a feature :)

Actually, it does - but you have to click in an editable box (e.g. password or user name) to see it. I made that decision as some people were complaining about the menu item crowding up the context menu. If you think about it, it does make sense.

I have add an option to "always show" it in the up and coming version 1.4. Dear reviewers, can you please submit bugs / feature requests here: http://quickpasswords.mozdev.org/bugs.html